• 文献标题:   Chemically Integrated Two-Dimensional Hybrid Zinc Manganate/Graphene Nanosheets with Enhanced Lithium Storage Capability
  • 文献类型:   Article
  • 作  者:   XIONG P, LIU BR, TERAN V, ZHAO Y, PENG LL, WANG X, YU GH
  • 作者关键词:   twodimensional nanosheet, znmn2o4, mixed transitionalmetal oxide, graphene, liion battery, energy storage
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:   Nanjing Univ Sci Technol
  • 被引频次:   110
  • DOI:   10.1021/nn5041203
  • 出版年:   2014

▎ 摘  要

Hybrid inorganic/graphene two-dimensional (2D) nanostructures can offer vastly open large surface areas for ion transport and storage and enhanced electron transport, representing a promising material platform for next-generation energy storage. Here we report chemically integrated hybrid ZnMn2O4/graphene nanosheets synthesized via a facile two-step method for greatly enhanced lithium storage capability. The hybrid 2D nanosheets are composed of ultrafine ZnMn2O4 nanocrystals with a mean diameter of similar to 4 nm attached to and well dispersed on the surface of reduced graphene oxide sheets. The hybrid nanosheets based anode offers a high capacity of similar to 800 mAh g(-1) at a current rate of 500 mA g(-1), excellent rate capability, and long-term cyclability with reversible capacity of similar to 650 mAh g(-1) over 1500 cycles at a current density of 2000 mA g(-1). Moreover, when tested in a temperature range of similar to 0-60 degrees C, the designed anode can maintain high discharge capacities from 570 to 820 mAh g(-1).